src/gallium/auxiliary/draw/draw_vs_exec.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sub license, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  21  * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
  22  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  23  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27
  28  /*
  29   * Authors:
  30   *   Keith Whitwell <keith@tungstengraphics.com>
  31   *   Brian Paul
  32   */
  33
  34 #include "pipe/p_util.h"
  35 #include "pipe/p_shader_tokens.h"
  36
  37 #include "draw_private.h"
  38 #include "draw_context.h"
  39 #include "draw_vs.h"
  40
  41 #include "tgsi/util/tgsi_parse.h"
  42
  43
  44 struct exec_vertex_shader {
  45    struct draw_vertex_shader base;
  46    struct tgsi_exec_machine *machine;
  47 };
  48
  49 static struct exec_vertex_shader *exec_vertex_shader( struct draw_vertex_shader *vs )
  50 {
  51    return (struct exec_vertex_shader *)vs;
  52 }
  53
  54
  55 /* Not required for run_linear.
  56  */
  57 static void
  58 vs_exec_prepare( struct draw_vertex_shader *shader,
  59                  struct draw_context *draw )
  60 {
  61    struct exec_vertex_shader *evs = exec_vertex_shader(shader);
  62
  63    /* specify the vertex program to interpret/execute */
  64    tgsi_exec_machine_bind_shader(evs->machine,
  65                                  shader->state.tokens,
  66                                  PIPE_MAX_SAMPLERS,
  67                                  NULL /*samplers*/ );
  68
  69 }
  70
  71
  72
  73
  74 /* Simplified vertex shader interface for the pt paths.  Given the
  75  * complexity of code-generating all the above operations together,
  76  * it's time to try doing all the other stuff separately.
  77  */
  78 static void
  79 vs_exec_run_linear( struct draw_vertex_shader *shader,
  80                     const float (*input)[4],
  81                     float (*output)[4],
  82                     const float (*constants)[4],
  83                     unsigned count,
  84                     unsigned input_stride,
  85                     unsigned output_stride )
  86 {
  87    struct exec_vertex_shader *evs = exec_vertex_shader(shader);
  88    struct tgsi_exec_machine *machine = evs->machine;
  89    unsigned int i, j;
  90    unsigned slot;
  91
  92    machine->Consts = constants;
  93
  94    for (i = 0; i < count; i += MAX_TGSI_VERTICES) {
  95       unsigned int max_vertices = MIN2(MAX_TGSI_VERTICES, count - i);
  96
  97       /* Swizzle inputs.
  98        */
  99       for (j = 0; j < max_vertices; j++) {
 100 #if 0
 101          debug_printf("%d) Input vert:\n", i + j);
 102          for (slot = 0; slot < shader->info.num_inputs; slot++) {
 103             debug_printf("\t%d: %f %f %f %f\n", slot,
 104                          input[slot][0],
 105                          input[slot][1],
 106                          input[slot][2],
 107                          input[slot][3]);
 108          }
 109 #endif
 110
 111          for (slot = 0; slot < shader->info.num_inputs; slot++) {
 112             machine->Inputs[slot].xyzw[0].f[j] = input[slot][0];
 113             machine->Inputs[slot].xyzw[1].f[j] = input[slot][1];
 114             machine->Inputs[slot].xyzw[2].f[j] = input[slot][2];
 115             machine->Inputs[slot].xyzw[3].f[j] = input[slot][3];
 116          }
 117
 118          input = (const float (*)[4])((const char *)input + input_stride);
 119       }
 120
 121       /* run interpreter */
 122       tgsi_exec_machine_run( machine );
 123
 124       /* Unswizzle all output results.
 125        */
 126       for (j = 0; j < max_vertices; j++) {
 127          for (slot = 0; slot < shader->info.num_outputs; slot++) {
 128             output[slot][0] = machine->Outputs[slot].xyzw[0].f[j];
 129             output[slot][1] = machine->Outputs[slot].xyzw[1].f[j];
 130             output[slot][2] = machine->Outputs[slot].xyzw[2].f[j];
 131             output[slot][3] = machine->Outputs[slot].xyzw[3].f[j];
 132
 133          }
 134
 135 #if 0
 136          debug_printf("%d) Post xform vert:\n", i + j);
 137          for (slot = 0; slot < shader->info.num_outputs; slot++) {
 138             debug_printf("\t%d: %f %f %f %f\n", slot,
 139                          output[slot][0],
 140                          output[slot][1],
 141                          output[slot][2],
 142                          output[slot][3]);
 143          }
 144 #endif
 145
 146          output = (float (*)[4])((char *)output + output_stride);
 147       }
 148
 149    }
 150 }
 151
 152
 153
 154
 155 static void
 156 vs_exec_delete( struct draw_vertex_shader *dvs )
 157 {
 158    FREE((void*) dvs->state.tokens);
 159    FREE( dvs );
 160 }
 161
 162
 163 struct draw_vertex_shader *
 164 draw_create_vs_exec(struct draw_context *draw,
 165                     const struct pipe_shader_state *state)
 166 {
 167    struct exec_vertex_shader *vs = CALLOC_STRUCT( exec_vertex_shader );
 168    uint nt = tgsi_num_tokens(state->tokens);
 169
 170    if (vs == NULL)
 171       return NULL;
 172
 173    /* we make a private copy of the tokens */
 174    vs->base.state.tokens = mem_dup(state->tokens, nt * sizeof(state->tokens[0]));
 175    tgsi_scan_shader(state->tokens, &vs->base.info);
 176
 177
 178    vs->base.prepare = vs_exec_prepare;
 179    vs->base.run_linear = vs_exec_run_linear;
 180    vs->base.delete = vs_exec_delete;
 181    vs->machine = &draw->machine;
 182
 183
 184    return &vs->base;
 185 }